package com.atguigu.gulimall.cart.controller;

import com.atguigu.gulimall.cart.service.CartService;
import com.atguigu.gulimall.cart.vo.Cart;
import com.atguigu.gulimall.cart.vo.CartItem;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.servlet.mvc.support.RedirectAttributes;

import java.util.List;
import java.util.concurrent.ExecutionException;

/**
 * @author wzb
 * @version V1.0
 * @Package com.atguigu.gulimall.cart.controller
 * @date 2022-08-22 14:19
 * @Copyright ©
 */
@Controller
public class CartController {


    @Autowired
    CartService cartService;


    @ResponseBody
    @GetMapping("/currentUserCartItems")
    public List<CartItem> getCurrentUserCartItems() {

        return cartService.getUserCartItems();
    }


    /**
     * 根据skuId删除购物项
     * @param skuId
     * @return
     */
    @GetMapping("/deleteItem")
    public String deleteItem(@RequestParam Long skuId) {
        cartService.deleteItem(skuId);

        return "redirect:http://cart.gulimall.com/cart.html";
    }


    /**
     * 实时更新购物项的商品数量
     * @param skuId
     * @param num
     * @return
     */
    @GetMapping("/countItem")
    public String countItem(@RequestParam Long skuId,
                            @RequestParam Integer num){
        cartService.changeItemCount(skuId, num);

        return "redirect:http://cart.gulimall.com/cart.html";
    }


    /**
     * 实时更新购物项的选择状态
     * @param skuId
     * @param check
     * @return
     */
    @GetMapping("/checkItem")
    public String checkItem(@RequestParam Long skuId,
                            @RequestParam Integer check){
        cartService.checkItem(skuId, check);

        return "redirect:http://cart.gulimall.com/cart.html";
    }



    /**
     * 浏览器有一个cookie； user-key:标识用户身份，一个月后过期
     * 如果第一次使用jd的购物车功能，都会给一个临时的用户身份；
     * 浏览器以后保存，每次访问都会带上这个cookie
     * <p>
     * 如果登录：session有
     * 没有登录：按照cookie里面带来user-key来做。
     * 第一次，如果没有临时用户，帮忙创建一个临时用户
     *
     */
    @GetMapping("/cart.html")
    public String cartListPage(Model model) throws ExecutionException, InterruptedException {

        Cart cart =  cartService.getCart();
        model.addAttribute("cart",cart);
        return "cartList";
    }


    /**
     * 添加商品到购物车
     *
     * @return
     */
    @GetMapping("/addToCart")
    public String addToCart(@RequestParam("skuId") Long skuId,
                            @RequestParam("num") Integer num,
                            RedirectAttributes ra) throws ExecutionException, InterruptedException {

        CartItem cartItem = cartService.addToCart(skuId, num);
        ra.addAttribute("skuId", skuId);
        return "redirect:http://cart.gulimall.com/addToCartSuccess.html";
    }


    @GetMapping("/addToCartSuccess.html")
    public String addToCartSuccessPage(@RequestParam("skuId") Long skuId,Model model) {
        //重定向到成功页面，再次查询购物车数据即可
        CartItem item = cartService.getCartItem(skuId);
        model.addAttribute("item",item);

        return "success";
    }

}
